fix: update getVersioningState to signal non-existent buckets with ErrNotFound

This change modifies the getVersioningState function to return filer_pb.ErrNotFound when a requested bucket does not exist, allowing callers to handle the situation appropriately, such as auto-creating the bucket in PUT handlers. This improves error handling and clarity in the API's behavior regarding bucket existence.

weed/s3api/s3api_bucket_config.go

@@ -519,7 +519,9 @@ func (s3a *S3ApiServer) getVersioningState(bucket string) (string, error) {
     config, errCode := s3a.getBucketConfig(bucket)
     if errCode != s3err.ErrNone {
         if errCode == s3err.ErrNoSuchBucket {
-			return "", nil
+            // Signal to callers that the bucket does not exist so they can
+            // decide whether to auto-create it (e.g., in PUT handlers).
+            return "", filer_pb.ErrNotFound
         }
         glog.Errorf("getVersioningState: failed to get bucket config for %s: %v", bucket, errCode)
         return "", fmt.Errorf("failed to get bucket config: %v", errCode)